Adding the haproxy prometheus exporter

templates/prometheus.yml.j2

@@ -246,6 +246,19 @@ scrape_configs:
           - 'gitlab-rails.{{datacenter_url}}'
         type: 'SRV'
 
+### haproxy
+  - job_name: haproxy.{{datacenter_url}}
+    metrics_path: /haproxy_metrics
+    scheme: https
+    tls_config:
+        ca_file: '/etc/ssl/prometheus_client/root.ca.crt'
+        cert_file: '/etc/ssl/prometheus_client/{{fqdn}}.crt'
+        key_file: '/etc/ssl/prometheus_client/{{fqdn}}.key'
+    dns_sd_configs:
+      - names:
+          - 'haproxy.{{datacenter_url}}'
+        type: 'SRV'        
+
 {%   if (prometheus_peers is defined) and (fqdn in prometheus_peers) %}
   - job_name: 'prometheus_servers'
     scheme: https